发布流程增加解锁赛伊德与腾讯安全中心截图教程

- 解锁赛伊德：皮肤与交接分区新增是/否必选项，存入 asset_summary，
  仅当号主选「是」时在买家端列表/详情展示「解锁赛伊德：是」
- 腾讯安全中心截图：新增可复用 GuideImage 组件（缩略图 + 点击全屏放大），
  在该截图槽位展示处罚截图教程图，仅提示用途、不占用上传数量

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/features/seller/views/SellerListingCreateView.vue

@@ -14,6 +14,8 @@ import { formatMoney } from '@/shared/utils/money'
 import type { AgreementContent } from '@/features/listings/api/listingOptions'
 import OptionChips from './components/OptionChips.vue'
 import PublishSection from './components/PublishSection.vue'
+import GuideImage from '@/components/GuideImage.vue'
+import tencentSecurityGuide from '@/assets/tencent-security-guide.webp'
 
 const {
   commonOnlineTimes,
@@ -115,6 +117,13 @@ const activeAgreement = ref<AgreementContent | null>(null)
 const activeAgreementTitle = computed(() => activeAgreement.value?.title || '协议内容')
 const activeAgreementContent = computed(() => activeAgreement.value?.content || '')
 
+const unlockSaidOptions = ['是', '否']
+
+// 截图槽位的指导示例图（仅展示、点击放大，不占用上传数量）
+const screenshotGuides: Record<string, string> = {
+  tencentSecurity: tencentSecurityGuide,
+}
+
 function toggleSkinOption(value: string | number) {
   toggleSkin(String(value))
 }
@@ -322,6 +331,15 @@ function selectDailyLoss(value: string | number) {
             </p>
           </div>
 
+          <div class="field-row panel-field-row">
+            <label>解锁赛伊德<span>*</span></label>
+            <OptionChips
+              :options="unlockSaidOptions"
+              :model-value="form.unlock_said"
+              @select="form.unlock_said = String($event)"
+            />
+          </div>
+
           <div class="time-preset-panel">
             <div class="time-preset-row">
               <strong>在线开始<span>*</span></strong>
@@ -427,6 +445,11 @@ function selectDailyLoss(value: string | number) {
                 <em v-if="getScreenshotLimitHint(slot.key)">{{
                   getScreenshotLimitHint(slot.key)
                 }}</em>
+                <GuideImage
+                  v-if="screenshotGuides[slot.key]"
+                  :src="screenshotGuides[slot.key] || ''"
+                  label="点击查看处罚截图教程"
+                />
               </div>
               <div v-if="getScreenshotCount(slot.key)" class="upload-preview-list">
                 <div